Refilling travel toothpaste yourself

Sometimes it’s helpful to know little hints like this, if a gadget works or not.

I bought an adaptor from Ebay to refill my travel toothpaste from a larger tube. It’s a screw-on adaptor. It didn’t work, it was too loose. I tried it on 3 brands of toothpaste and it didn’t work on any of them.

So I just put the tubes together end-to-end, real firm, and refilled it that way.